Reversible disk harrow.



No. 875,805. PATENTED JAN. '7, 1908.

W. S. GRAHAM & P. L. DEWEY.

REVERSIBLE DISK HARROW.

APPLICATION FILED JUNE 6,1906.

' 2 SHEETS-SHEET 1.

77z we 72 20 75,

'wzzizeaaea 7mm? .5. 67%;,

OUYP.

f/zezr af z arzzgy.

1n: Nmmls r-crsns ca, wAsnnvcToN, u. c.

No. 875,805. PATENTED JAN. 7, 1908.

W. S. GRAHAM & F. L. DEWEY.

REVERSIBLE DISK HARROW.

APPLICATION FILED JUNE 6.1906.

2 SHEETS-SHEET 2.

I 71 mentors M22 65565 I MIX/2km? 5- raka7m v fredgnzu zde UNITED STATESPriTENT OFFICE.

WILLIAM S. GRAHAM AND FREDERIG L. DEWEY, OFOANTON, ILLINOIS, ASSIGNORSTO PARLIN & ORENDORFF COMPANY, OF CANTON, ILLINOIS, A CORPORATION OFILLI- NOIS.

REVERSIBLE DISK HARROW.

Patented Jan. 7, 1908.

Application filed June 6,1906. Serial No. 320.463.

T 0 all whom it may concern:

Be it known that we, lVILLIAM S. GRAHAM and FREDERIO L. DEWEY, residentsoi the city of Canton, county of Fulton, and State of Illinois, haveinvented certain new and useful Improvements in Reversible Disk Harrows,of which the following is a specification.

This invention relates in part to the l'ra me structure, in part to themeans used to tilt the gangs with relation to the horizontal and in partto the provision for reversing the disks, so as to throw to or from thecenter. The invention is exemplified in the structure hereinafterdescribed and it is defined in the appended claims.

In the drawings forming part of this specification Figure 1 is a planview of a harrow embodying our improvements, one gang being swung insuch manner that, when set at the proper angle, .it will throw the soiltoward the center and the other gang being reversed, or arranged tothrow the soil from the center, Fig. 2 is a section vertically throughthe center of the vertical pivot for one of the gangs, showing how thearch of the gang is held in position to control the relation of the gangto the surface of the soil. Fig. 3 is a planof the saddle that acts apivot and as a part of the arch clamp. Fig. 1 .is a plan of the combinedclamp plate and arm bracket which aids in clamping the gang arch andprovides connections for the arms used to swing the gangs horizontally.

The tongue of the harrow is shown at 1, at 2 and 3 are shown parallelcross bars which comprise essential elements of the frame and at 6 and 7are shown brace bars which extend from the ends oi the cross lrameobliquely forward to the tongue. The ends of cross bars 2 and 3 are bentat right angles, as shown at 41 and 5, and the brace bars are bent toconform to the turned ends of the cross bars. The bent ends of the crossbars are turned toward each other, at each end, the ends of the bracebars overlap the bent ends of the cross bars and bolts connect the crossbars with the brace bars and the brace bars with the tongue. Brackets 8are attached to the brace bars between the cross frame and the tongue,rack brackets 9 and 10 are secured to the tongue in line with brackets 8and rock shafts 11 and 12 journal in the brackets S and in bearings inthe rack brackets. The sha'l'ts 11 and 12 are noncircular and arms 13and 14.- are clamped one on each of the shafts.

The disks 29 are arranged in two gangs, each gang being journalcd on anindependent shaft, and arch bars 27are secured to bearings on the gangshaft, an arch to each gang. The upper parts of the arches form arcs ofcircles and they are clamped in different positions to vary thehorizontal arrangement of the gangs.

Secondary frames 17 are secured to the cross bars 2 and 3 by means ofbolts 19 and they have circular vertical bearing rings 18 For the pivotsof the gangs. The secondary frames may be set farther apart or closertogether in order to properly adjust the space between gangs and whenthey are in place they are rigid with relation to the cross frame.

Saddles 20 are adapted to sit on the curved summits of the arch bars andeach is providcd with an upward-extending circular bearing 21 which isrotatable in a bearing ring 18 of a secondary frame 17. A cap plate 22its on the upper end of the pivot extension of each saddle plate and itoverlaps the ring 18 to hold the saddle pivot in the secondary frame. Aclamp plate 24 its against the under surface of each arch bar, oppositethe saddle, and bolts 23 extend upward through the clamp plate, onopposite sides of the arch bar, and pass through holes in the cap plate22. Nuts on the ends of the bolts above the cap plate, clamp the archbar between the saddle and the clamp plate and hold the arch in anydesired position.

A lateral extension of the clamp plate lies alongside the arch bar andextends in opposite directions from the center of the clamp plate, asshown at 25 and 26 in Fig. 4. These extensions 'lorm connections for acontrolling arm. 28, and they provide means for extending the arm ineither direction from the arch pivot. Link rods 15 and 16 connect thecontrolling arms 28 with arms 13 and 14 on shafts 11 and 12, and locklevers 30 and 31 provide means for rocking the shafts and for holdingthem in place.

When the harrow is in operation both gangs are set to throw eithertoward the center or from the center and are inclined to present theconcave surfaces of the disks obliquely to the soil.

When it is desired to throw the soil toward the center, the gangs areboth set as shown at the upper end of Fig. 1, the con trolling arm 28 ofthe lower gang being shifted to end 26 of the connection plate to giveit the proper inward extension. Under these conditions the lock lever 31will be thrown forward, the same as lever 30, while the gangs are intheir shown alinement, and the levers will both be carried backward, to-

ward seat 34, to give the proper cutting ob-- liquity to the disks. Whenit is desired to reverse the disks, the controlling arms aredisconnected, the gangs are turned end-for end, as shown at the lowerend of Fig. 1, and the controlling arms are re-connected with theconnection plates at the opposite ends thereof. This will cause bothlook levers to incline backward, while the gangs are in alinement, andthe levers will be pushed forward to give proper obliquity to the disks.

The inner ends of the gangs are carried forward when the soil is throwntoward the center and are carried backward when it is desired to throwthe soil from the center. The extent of movement from. one extreme toanother is considerable and it has heretofore been impossible to get therequired motion in the controlling levers without exces sive throw ofthe levers or excessive work on account of length of the work-ends ofthe levers. But by shifting the arms 28 to the front of the verticalpivots of the gangs when the soil is thrown from the center, andreversing the arrangement while throwing to the center, the motion ofthe controlling levers is no greater than if the gangs were notreversible, and sufficient force to control the gangs may be readilydeveloped by the comparatively short swing of the levers.

The clamped arch bars provide simple and effective means for adjustingthe gangs horizontally and the positions of the clamp bolts on oppositesides of the arch bar obviates the necessity of slotting the bar.

The main frame is simple in construction and quite strong in proportionto its weight. The secondary frame is easily secured to the main frameand adjusted crosswise thereof, and when it is secured in place it isperfectly stable. The brace bars strengthen the frame while providingbearings for the outer ends of the rock shafts and the rock shaftsprovide for all the sidewise shift the rock arms may ever need. Thetongue is secured to the cross bar 2, by bracket 32,

and so the entire frame structure is in the nature of a truss.

I/Ve cla1m as new and desire to secure by Letters Patent:

1. In a reversible disk harrow, the combination of a pair of parallelcross bars, a tongue connected to the cross bars at the longitudinalcenter thereof, oblique brace bars secured to in-turned ends of thecross bars and to the tongue, gang-carrying secondary frames secured tothe parallel bars, and gang-controlling rock shafts journaled inbearings on the tongue and on the brace bars, substantially asdescribed.

attached to the longitudinal center of the I 1 cross frame, brace barsextending obliquely from the ends of the cross frame to the tongue, rackbrackets secured to opposite sides of the tongue, brackets attached tothe brace bars, rock shafts journaled in the brackets on the cross barsand the brackets on the tongue, lock levers for the rock shafts coactingwith the racks, arms on the shafts and link rods connecting the armswith the disk gangs, substantially as described.

4. In a reversible disk harrow, the combination with a frame, a circularbearing journaled in said frame and having an arched lower surface, anda disk gang, of an arch bar secured to said disk gang and adapted toconform to the arched lower surface of said circular bearing, a clampplate adapted to bear against the under side of said arch bar, and meansfor adjustably clamping said arch bar between said circular bearing andsaid clamp plate, substantially as described.

5. In a reversible disk harrow, the com' bination of a frame having avertical journal bearing, a disk gang, an arch bar attached to the diskgang, a clamp saddle conforming to the upper surface of the arch andhaving an upward-extended pivot conforming to the journal bearing of theframe, a clamp plate adapted to fit the under surface of the arch, a capplate for the pivotal extension of the clamp saddle, said cap platebeing projected over the journal bearing, and bolts extended through theclamp members and the cap plate on opposite sides of the arch bar,substantially as described.

6. In a reversible disk harrow, the combination of a frame, a pair ofdisk gangs levers and the arms, substantially, as de- 10 swung onvertlcal pivots 1n the lrame, a hoi'iscribed.

zontal connection-plate to one side of the In testimony whereof We signour names axis of the disks, said plate extending length wise of theaxis of the gang in both directions from the pivot thereof, an arm foreach gang adapted to be connected with either extension of theconnection-plate, levers in front of the gangs, and connections betweenthe in the presence of two subscribing witnesses.

WVILLIAM S. GRAHAM. FREDERIC L. DEWEY. In the presence of- VVALTER B.BARNEY, K. 1). VI'ITUM.

